Skip the auto shop - Our mechanics make house calls

Q: Car won't start after getting gas

asked by on

When getting gas and going to start my car it's not starting up. I have to put pressure on the brake for a few seconds and then my car will start right up. I have to sometimes hurry and put it in drive so it won't go down as well.

My car has 150000 miles.
My car has an automatic transmission.

A: Hello. If this is occurring right after you...

Hello. If this is occurring right after you get fuel then most of the time it is caused by a vent valve or purge valve that is sticking open. Most of the time it is a purge valve problem. This valve is part of the evaporative emissions system and needs to be closed most of the time, especially when fueling. If it is open it will allow fuel vapor and even at times raw fuel to enter the engine while fueling. This essentially causes a rich condition or floods the engine and that is why it takes time to start it back up. It can also be a failing fuel pump or coincidentally a failing crankshaft position sensor. These are all common, but I always check with the evap system parts first. If you need to have this hard starting problem figured out, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose and repair this.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: No fuel presure cranks no start, new pump and filter.

Hello. I would recommend checking your fuel filter. Fuel filters are designed to have a one way flow. If the fuel filter is installed backwards the fuel will not reach the engine. This will cause the fuel pump to run...

Q: Key won't turn in the ignition 1978 Ford Mustang II

Hi there - there a couple of possible faults preventing your ignition key from turning in the ignition lock cylinder. First is that the key is sufficient worn, or the lock tumblers themselves, that they are simply not moving the...

Q: High pitched whining noise on startup

The secondary air injection pump is well known for making noises such as this on all cars that use them. It only runs when the motor is below a preset temperature. So the longer you let the car sit, the...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...